<template>
  <div class="login">
    <div class="login_box">
      <!-- 头部区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //这是登录表单的数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456"
      },
      //这是表单的验证规则对象
      loginFormRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 10, message: "长度在3到10个字符", trigger: "blur" }
        ],
        //验证密码是否合法
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在6到15个字符", trigger: "blur" }
        ]
      }
    };
  },
  methods: {
      //点击重置按钮，重置登录表单
      resetLoginForm(){
      this.$refs.loginFormRef.resetFields();
      },
      login(){
          this.$refs.loginFormRef.validate(async valid=>{
              if(!valid) return;
            const {data:res} = await this.$http.post("login", this.loginForm);
              if(res.meta.status !== 200) return this.$message.error("登录失败");
               this.$message.success("登录成功");
              //1.将登录成功之后的 token， 保存在客户端的 sessionStorage 中
              // 1.1 项目中出了登录之外的其他API接口 必须在登录之后才能访问
              // 1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 swssionStorage 中
              window.sessionStorage.setItem("token",res.data.token);
              // 2.通过编程式导航跳转到后台主页， 路由地址是 /home
              this.$router.push("/home")
              
              
          })
      }
  },
};
</script>

<style lang="less" scoped>
.login {
  background: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>